Breach filing
Under investigationMedStar Health, Inc.: 64,332 individuals, Dec 2025.
MedStar Health, Inc. reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 3 December 2025. The filing records the organisation as a healthcare provider in Maryland and lists 64,332 individuals affected, which makes it the 28th largest of the 170 Maryland filings on the register and the 129th largest of the 798 filings submitted nationally in 2025. Among the 19 Maryland filings made in 2025 it ranks 7th.
Individuals affected
64,332
As reported to HHS
Modelled cost (IBM 2025)
$10.3M
Method shown, not disclosed
Rank in MD
28th
of 170 Maryland filings
Rank in 2025
129th
of 798 filings nationally
Section F.1 / The filing
As posted by HHS OCR
Every value below is the portal's own field for this filing, plus its rank within the register.
- Covered entity type
- Healthcare Provider
- Individuals affected
- 64,332
- Breach submission date
- 3 December 2025
- Submission year
- 2025
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- State
- Maryland (MD)
- Portal status
- listed by HHS OCR under Cases Currently Under Investigation
- Rank in Maryland by size
- 28th of 170
- Rank in 2025 nationally
- 129th of 798
- Maryland median filing
- 4,792 individuals
- Register id (derived)
- MD-20251203-medstar-health
Section F.2 / In context
Where this filing sits in Maryland and in 2025
OCR classifies the incident as a hacking or IT incident, with the breached information held in a network server. Hacking/IT Incident is the type recorded on 117 of the 170 Maryland filings (69%) and on 81% of all filings submitted in 2025. Network Server appears on 45% of Maryland filings.
No business associate is recorded on the filing; 38% of Maryland filings do involve one. At 64,332 individuals the breach is 13 times the Maryland median filing of 4,792 and 16 times the national median of 4,000 across all 7,884 filings. It sits in the 10,000 to 99,999 band, which holds 1,938 filings.
As of 28 August 2026 the case is listed by HHS OCR under Cases Currently Under Investigation. OCR has not published a closing summary, so this page is limited to the fields on the filing itself; the archive entry that follows a closed investigation usually adds a short account of what was exposed and what the entity did afterwards.
Maryland's breach notification statute (Md. Code, Com. Law 14-3504) requires notice to affected residents within 45 days after discovery or notification of the breach. Its attorney general threshold: all breaches (AG notified before individual notices are sent). The HIPAA Breach Notification Rule ran alongside it: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery, which is the clock that put this filing on the portal.
Multiplying 64,332 individuals by IBM's $160 customer-PII cost per record (Cost of a Data Breach 2025, the figure the site's calculator uses) gives a modelled $10.3M; the 2026 edition's $192 gives $12.4M. Both are modelled estimates with the method shown, not costs disclosed by MedStar Health, Inc.. For scale, IBM's 2026 average cost of a healthcare breach is $6.64M, so this filing models at 1.9 times the sector average.
Section F.5 / Modelled cost
64,332 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
ModelledIBM 2025 customer PII, $160 per record
$10.3M
64,332 x $160
IBM 2026 customer PII, $192 per record
$12.4M
64,332 x $192
Method: individuals affected, as reported by MedStar Health, Inc. to HHS, multiplied by IBM's customer-PII cost per record (Cost of a Data Breach 2025 Figure 6 and the 2026 edition). No cost has been disclosed by the entity for this filing; the figure is a planning estimate, not a fact about the breach. IBM's per-record figures come from mid-volume breaches and IBM cautions against applying them to breaches involving millions of records; the site's per-record page explains where the multiplication holds and where it breaks down.
Context: IBM's average cost of a healthcare breach is $6.64M in the 2026 report ($7.42M in 2025); the global average across all sectors was $4.44M in 2025.
Cost per record: method and limits / Healthcare breach cost, IBM 2026
Section F.6 / Notification clock
Maryland statute and the HIPAA rule
State notification statute
Maryland: Md. Code, Com. Law 14-3504
- Notice to individuals
- Within 45 days after discovery or notification of the breach
- Attorney general threshold
- All breaches (AG notified before individual notices are sent) (Before individual notifications are sent)
- Private right of action
- No: No PROA under the breach statute; AG enforcement only
- Penalty
- Unfair or deceptive trade practice; up to $10,000 per violation, $25,000 per repeat violation
The HIPAA Breach Notification Rule runs alongside the state statute: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery.
Section F.7 / Peer filings
Maryland filings closest in size
Neighbours by size rank among Maryland filings in 2025, topped up from other years where 2025 has too few. Filings of 10,000 or more link to their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Centers for Medicare & Medicaid ServicesOpen | Health Plan | 107,154 | 30 Jun 2025 | |||
| Columbia Medical PracticeOpen | Healthcare Provider | 94,131 | 5 Dec 2025 | |||
| Fundamental Administrative Services, LLC | Business Associate | 56,325 | 21 Mar 2025 | |||
| Rheumatology Associates of Baltimore | Healthcare Provider | 28,968 | 21 Apr 2025 |
Index / Companion schedules
13 HHS breach register
→Hub: every filing, by state, year and entity.
04 Biggest breaches
→Mega-breaches with primary-source cost figures.
Industry / Healthcare
→IBM 2026: $6.64M average, 13 years at #1.
Regulation / HIPAA penalties
→OCR enforcement tiers and the 60-day rule.
11 50-state laws
→Deadline, AG threshold and penalties per state.
Cost / Per record
→Where the per-record model is reliable.
Provenance
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal (breaches affecting 500 or more individuals), retrieved 2026-08-28. Public domain. Individuals affected and dates as reported by the covered entity.
Portal: ocrportal.hhs.gov breach report. Statutory basis: HITECH Act section 13402(e)(4): the Secretary must post a list of breaches of unsecured protected health information affecting 500 or more individuals. Breaches affecting fewer than 500 individuals are reported to OCR annually and are not posted, so they are not on this register. Status wording follows the portal's two tabs ("Cases Currently Under Investigation" and "Archive") as of 28 August 2026; a filing moves to the archive when OCR closes the case. Modelled costs on this site are a method applied to the reported count, using IBM Cost of a Data Breach per-record figures, and are never a cost disclosed by the entity. This row: hhs-breach-under-investigation__2026-08-28.csv, export row 330.
Corrections: if you represent a listed entity and the portal row has been amended, email [email protected] with the portal entry and we will re-pull the export.